人教版高中英语必修三《Space Exploration》SectionⅢ PPT课件下载，共24页。
《Space Exploration》SectionⅢ PPT课件包含语法精讲、冲关训练、长难句分析、应用落实等内容。
不定式作定语和状语
不定式由“to＋动词原形”构成，有时to可以省略，其否定形式是“not to do”。不定式没有人称和数的变化，但有时态、语态的变化。不定式不能作谓语，但可以作主语、宾语、状语、表语、定语和补语。本单元主要讲述不定式作定语和状语的用法。
[观察例句]
1．I trained for a long time to fly airplane as a fighter pilot.
2．As we all know，an astronaut needs to be healthy and calm in order to work in space.
3．First of all，you must be intelligent enough to get a related college degree.
4．Some scientists were determined to help humans realise their dream to explore space.
5．On 12 April 1961，Yuri Gagarin became the first person in the world to go into space.
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关键词：Space Exploration PPT课件免费下载，.PPT格式；
